18 mos old waking up in the middle of the night

Lovely

My daughter who is now 18 mos old was sleep trained when she was 6 mos old and since then she sleeps through the night, she also sleeps on her own room. But its been a week now that she wakes up early like 2am 5am wanting me on her side. What should i do? Just let her cry just like i did when we sleep trained her? But gosh her crying is louder now than when she was 6mos old 😂